Focus on the pronunciation of blister
English definition of “blister”
/ˈblɪs·tər/ n [C]
› a painful swelling on the skin, often filled with a watery liquid, caused by a burn or by rubbing against something: I got blisters from my new shoes. › A blister is also a raised place on a painted surface. blister
/ˈblɪs·tər/ v [I/T] › [T] Grace’s feet were blistered and numb with cold.